"use client";

import { useEffect, useMemo, useRef, useState, type ChangeEvent } from "react";
import useSWR from "swr";
import { toast } from "sonner";
import {
  Download,
  Image as ImageIcon,
  Loader2,
  MousePointerClick,
  Sparkles,
  Type,
  Upload,
} from "lucide-react";
import { fetchUploadWithRetry } from "@/lib/client/upload-with-retry";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { ScrollArea } from "@/components/ui/scroll-area";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
import { Textarea } from "@/components/ui/textarea";
import {
  isAgentPsdImageLayerSlot,
  isAgentPsdTextLayerSlot,
  type AgentPsdTemplate,
  type AgentPsdTemplateImageLayerSlot,
  type AgentPsdTemplateLayerSlot,
  type AgentPsdTemplateListResponse,
  type AgentPsdTemplateRenderResponse,
  type AgentPsdTemplateTextLayerSlot,
} from "@/lib/agents/psd-template-config";

const fetcher = (url: string) => fetch(url, { cache: "no-store" }).then((res) => res.json());

function createInitialState(template: AgentPsdTemplate | null, sourceImageUrl: string) {
  const imageAssignments: Record<string, string> = {};
  const textAssignments: Record<string, string> = {};

  if (!template) {
    return { imageAssignments, textAssignments };
  }

  for (const layer of template.layers) {
    if (isAgentPsdImageLayerSlot(layer) && layer.isDefaultResultSource && sourceImageUrl) {
      imageAssignments[layer.id] = sourceImageUrl;
    }
    if (isAgentPsdTextLayerSlot(layer) && layer.defaultText) {
      textAssignments[layer.id] = layer.defaultText;
    }
  }

  return { imageAssignments, textAssignments };
}

function getLayerLabel(layer: AgentPsdTemplateLayerSlot) {
  return isAgentPsdImageLayerSlot(layer) ? "可替换图片" : "可编辑文字";
}

function getLayerOutlineColor(layer: AgentPsdTemplateLayerSlot) {
  return isAgentPsdImageLayerSlot(layer)
    ? "rgba(249,115,22,0.95)"
    : "rgba(56,189,248,0.95)";
}

function buildPreviewFontFaces(template: AgentPsdTemplate | null) {
  if (!template) return "";

  const rules = new Map<string, string>();
  for (const layer of template.layers) {
    if (!isAgentPsdTextLayerSlot(layer) || !layer.fontFamily || !layer.fontFileUrl) {
      continue;
    }
    if (rules.has(layer.fontFamily)) {
      continue;
    }
    rules.set(
      layer.fontFamily,
      `@font-face { font-family: "${layer.fontFamily}"; src: url("${layer.fontFileUrl}") format("${layer.fontContentType?.includes("woff2") ? "woff2" : layer.fontContentType?.includes("woff") ? "woff" : layer.fontContentType?.includes("otf") ? "opentype" : "truetype"}"); font-display: swap; }`
    );
  }

  return Array.from(rules.values()).join("\n");
}

function getPreferredSelectedLayerId(template: AgentPsdTemplate | null) {
  if (!template || template.layers.length === 0) {
    return "";
  }

  const preferredImage = template.layers.find(
    (layer) => isAgentPsdImageLayerSlot(layer) && layer.isDefaultResultSource
  );
  if (preferredImage) {
    return preferredImage.id;
  }

  return template.layers[0]?.id || "";
}

export function AgentPsdTemplateEditorDialog({
  open,
  onOpenChange,
  sourceImageUrl,
  brandName,
}: {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  sourceImageUrl: string | null;
  brandName?: string | null;
}) {
  const normalizedBrandName = String(brandName || "").trim();
  const { data, isLoading } = useSWR<AgentPsdTemplateListResponse>(
    open && normalizedBrandName
      ? `/api/psd-templates?brand=${encodeURIComponent(normalizedBrandName)}`
      : null,
    fetcher
  );
  const templates = useMemo(() => (data?.success ? data.templates : []), [data]);

  const [selectedTemplateId, setSelectedTemplateId] = useState<string>("");
  const [selectedLayerId, setSelectedLayerId] = useState<string>("");
  const [imageAssignments, setImageAssignments] = useState<Record<string, string>>({});
  const [textAssignments, setTextAssignments] = useState<Record<string, string>>({});
  const [uploadingSlotId, setUploadingSlotId] = useState<string | null>(null);
  const [isRendering, setIsRendering] = useState(false);
  const [renderedResultUrl, setRenderedResultUrl] = useState<string>("");
  const [stageScale, setStageScale] = useState(1);

  const previewViewportRef = useRef<HTMLDivElement | null>(null);
  const uploadInputRef = useRef<HTMLInputElement | null>(null);

  const selectedTemplate = useMemo(
    () => templates.find((template) => template.id === selectedTemplateId) || null,
    [selectedTemplateId, templates]
  );

  const editableImageLayers = useMemo(
    () =>
      (selectedTemplate?.layers || []).filter((layer) =>
        isAgentPsdImageLayerSlot(layer)
      ),
    [selectedTemplate]
  );
  const editableTextLayers = useMemo(
    () =>
      (selectedTemplate?.layers || []).filter((layer) =>
        isAgentPsdTextLayerSlot(layer)
      ),
    [selectedTemplate]
  );
  const fixedLayerCount = useMemo(() => {
    if (!selectedTemplate) return 0;
    return Math.max(0, selectedTemplate.layerCount - selectedTemplate.layers.length);
  }, [selectedTemplate]);

  const effectiveImageAssignments = useMemo(() => {
    const nextAssignments: Record<string, string> = {};
    if (!selectedTemplate) {
      return nextAssignments;
    }

    for (const layer of editableImageLayers) {
      const explicit = String(imageAssignments[layer.id] || "").trim();
      if (explicit) {
        nextAssignments[layer.id] = explicit;
        continue;
      }

      if (layer.isDefaultResultSource && sourceImageUrl?.trim()) {
        nextAssignments[layer.id] = sourceImageUrl.trim();
      }
    }

    return nextAssignments;
  }, [editableImageLayers, imageAssignments, selectedTemplate, sourceImageUrl]);

  const effectiveTextAssignments = useMemo(() => {
    const nextAssignments: Record<string, string> = {};
    if (!selectedTemplate) {
      return nextAssignments;
    }

    for (const layer of editableTextLayers) {
      const explicit = textAssignments[layer.id];
      nextAssignments[layer.id] =
        typeof explicit === "string" ? explicit : String(layer.defaultText || "");
    }

    return nextAssignments;
  }, [editableTextLayers, selectedTemplate, textAssignments]);

  const selectedLayer = useMemo(
    () => selectedTemplate?.layers.find((layer) => layer.id === selectedLayerId) || null,
    [selectedLayerId, selectedTemplate]
  );
  const selectedImageLayer = selectedLayer && isAgentPsdImageLayerSlot(selectedLayer) ? selectedLayer : null;
  const selectedTextLayer = selectedLayer && isAgentPsdTextLayerSlot(selectedLayer) ? selectedLayer : null;
  const fontFaceCss = useMemo(() => buildPreviewFontFaces(selectedTemplate), [selectedTemplate]);

  useEffect(() => {
    if (!open) return;

    if (templates.length > 0 && !templates.some((template) => template.id === selectedTemplateId)) {
      setSelectedTemplateId(templates[0].id);
    }
  }, [open, selectedTemplateId, templates]);

  useEffect(() => {
    if (!open) return;
    setRenderedResultUrl("");
    const initialState = createInitialState(selectedTemplate, sourceImageUrl || "");
    setImageAssignments(initialState.imageAssignments);
    setTextAssignments(initialState.textAssignments);
    setSelectedLayerId(getPreferredSelectedLayerId(selectedTemplate));
  }, [open, selectedTemplate, sourceImageUrl]);

  useEffect(() => {
    if (!selectedTemplate) {
      setStageScale(1);
      return;
    }

    const element = previewViewportRef.current;
    if (!element) return;

    const updateScale = () => {
      const rect = element.getBoundingClientRect();
      const availableWidth = Math.max(240, rect.width - 32);
      const availableHeight = Math.max(240, rect.height - 32);
      const nextScale = Math.min(
        availableWidth / Math.max(1, selectedTemplate.width),
        availableHeight / Math.max(1, selectedTemplate.height),
        1
      );
      setStageScale(Number.isFinite(nextScale) && nextScale > 0 ? nextScale : 1);
    };

    updateScale();
    const observer = new ResizeObserver(updateScale);
    observer.observe(element);
    return () => {
      observer.disconnect();
    };
  }, [selectedTemplate]);

  async function handleSlotUpload(slotId: string, event: ChangeEvent<HTMLInputElement>) {
    const file = event.target.files?.[0];
    if (!file) return;

    try {
      setUploadingSlotId(slotId);
      const formData = new FormData();
      formData.set("file", file);
      const response = await fetchUploadWithRetry(formData);
      const payload = await response.json();

      if (!response.ok || !payload.url) {
        throw new Error(payload.error || "图片上传失败");
      }

      setImageAssignments((current) => ({
        ...current,
        [slotId]: payload.url,
      }));
      toast.success("替换图片已上传");
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "素材上传失败");
    } finally {
      setUploadingSlotId(null);
      event.target.value = "";
    }
  }

  function openImageUpload(slotId: string) {
    setSelectedLayerId(slotId);
    if (uploadInputRef.current) {
      uploadInputRef.current.value = "";
      uploadInputRef.current.click();
    }
  }

  async function handleRender() {
    if (!selectedTemplate) {
      toast.error("请先选择 PSD 模板");
      return;
    }

    try {
      setIsRendering(true);
      const response = await fetch("/api/psd-templates/render", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          templateId: selectedTemplate.id,
          sourceImageUrl: sourceImageUrl || "",
          imageAssignments: effectiveImageAssignments,
          textAssignments: effectiveTextAssignments,
        }),
      });

      const payload = (await response.json()) as AgentPsdTemplateRenderResponse;
      if (!response.ok || !payload.success || !payload.result?.url) {
        throw new Error(payload.error || "PSD 模板渲染失败");
      }

      setRenderedResultUrl(payload.result.url);
      toast.success("模板替换结果已生成");
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "PSD 模板渲染失败");
    } finally {
      setIsRendering(false);
    }
  }

  function handleDownload() {
    if (!renderedResultUrl) return;
    window.open(renderedResultUrl, "_blank", "noopener,noreferrer");
  }

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent
        overlayClassName="bg-black/85 backdrop-blur-sm"
        className="flex h-[92vh] w-[96vw] max-w-[1700px] flex-col overflow-hidden border border-white/10 bg-[#09090b] p-0 text-white shadow-[0_30px_120px_rgba(0,0,0,0.65)]"
      >
        <DialogHeader className="border-b border-white/10 bg-[#09090b] px-6 py-5">
          <DialogTitle className="flex items-center gap-2">
            <Sparkles className="h-5 w-5 text-orange-500" />
            套用 PSD 模板
          </DialogTitle>
          <DialogDescription>
            这里是直接在模板里替换图片和修改文字，不会再次调用 AI 生图模型。
          </DialogDescription>
        </DialogHeader>

        {fontFaceCss ? <style>{fontFaceCss}</style> : null}

        <div className="grid min-h-0 flex-1 grid-cols-1 overflow-hidden xl:grid-cols-[300px_minmax(0,1fr)_380px]">
          <div className="min-h-0 border-b border-white/10 bg-[#09090b] p-5 xl:border-b-0 xl:border-r">
            <ScrollArea className="h-full pr-4">
              <div className="space-y-4">
                <div className="space-y-2">
                  <Label>选择模板</Label>
                  <Select value={selectedTemplateId} onValueChange={setSelectedTemplateId}>
                    <SelectTrigger>
                      <SelectValue placeholder={isLoading ? "加载模板中..." : "请选择模板"} />
                    </SelectTrigger>
                    <SelectContent>
                      {templates.map((template) => (
                        <SelectItem key={template.id} value={template.id}>
                          {template.name}
                        </SelectItem>
                      ))}
                    </SelectContent>
                  </Select>
                </div>

                {selectedTemplate ? (
                  <>
                    <div className="mx-auto w-full max-w-[220px] overflow-hidden rounded-2xl border border-white/10 bg-white/5">
                      <div
                        style={{
                          aspectRatio: `${Math.max(1, selectedTemplate.width)} / ${Math.max(1, selectedTemplate.height)}`,
                        }}
                      >
                        <img
                          src={selectedTemplate.previewUrl}
                          alt={selectedTemplate.name}
                          className="h-full w-full object-contain"
                        />
                      </div>
                    </div>

                    <div className="flex flex-wrap items-center gap-2">
                      <Badge variant="secondary">{selectedTemplate.brandName}</Badge>
                      <Badge variant="secondary">
                        {selectedTemplate.width} x {selectedTemplate.height}
                      </Badge>
                      <Badge variant="outline">{editableImageLayers.length} 个可替换图片</Badge>
                      <Badge variant="outline">{editableTextLayers.length} 个可编辑文字</Badge>
                      {fixedLayerCount > 0 ? (
                        <Badge variant="outline">{fixedLayerCount} 个固定图层</Badge>
                      ) : null}
                    </div>

                    <div className="rounded-xl border border-dashed border-white/15 bg-white/[0.02] p-3 text-xs leading-6 text-muted-foreground">
                      操作方式更接近 PS：
                      直接点击模板里的图片区域去替换图片，点击模板里的文字区域直接改现有文字。
                    </div>

                    <Button
                      onClick={handleRender}
                      disabled={isRendering}
                      className="w-full bg-gradient-to-r from-orange-600 to-rose-600 hover:from-orange-500 hover:to-rose-500"
                    >
                      {isRendering ? (
                        <Loader2 className="mr-2 h-4 w-4 animate-spin" />
                      ) : (
                        <Sparkles className="mr-2 h-4 w-4" />
                      )}
                      应用模板并导出
                    </Button>
                  </>
                ) : (
                  <div className="rounded-2xl border border-dashed border-white/15 p-5 text-sm text-muted-foreground">
                    {isLoading
                      ? "正在加载可用模板..."
                      : normalizedBrandName
                        ? `当前品牌“${normalizedBrandName}”下还没有可用 PSD 模板，请先去后台配置。`
                        : "当前还没有启用的 PSD 模板，请先去后台配置。"}
                  </div>
                )}
              </div>
            </ScrollArea>
          </div>

          <div className="min-h-0 border-b border-white/10 bg-[#09090b] p-5 xl:border-b-0 xl:border-r">
            <div className="mb-4 flex flex-wrap items-center gap-2">
              <div className="text-sm font-medium">模板画布编辑区</div>
              {selectedTemplate ? (
                <>
                  <Badge variant="outline">{editableImageLayers.length} 个图片替换区域</Badge>
                  <Badge variant="outline">{editableTextLayers.length} 个文字编辑区域</Badge>
                </>
              ) : null}
            </div>
            <div className="mb-4 text-xs text-muted-foreground">
              点模板上的橙色框替换图片，点蓝色框直接修改文字。
            </div>

            <div
              ref={previewViewportRef}
              className="relative flex h-full min-h-[520px] items-start justify-center overflow-auto rounded-2xl border border-white/10 bg-[#111114]"
            >
              {selectedTemplate ? (
                <div
                  className="relative my-4"
                  style={{
                    width: selectedTemplate.width * stageScale,
                    height: selectedTemplate.height * stageScale,
                  }}
                >
                  <div
                    className="absolute left-0 top-0 overflow-hidden rounded-[20px] shadow-2xl"
                    style={{
                      width: selectedTemplate.width,
                      height: selectedTemplate.height,
                      transform: `scale(${stageScale})`,
                      transformOrigin: "top left",
                    }}
                  >
                    <img
                      src={selectedTemplate.renderBaseUrl || selectedTemplate.previewUrl}
                      alt={`${selectedTemplate.name} 编辑底图`}
                      className="absolute inset-0 h-full w-full object-cover"
                    />

                    {editableImageLayers.map((layer) => {
                      const assignedUrl = effectiveImageAssignments[layer.id];
                      const isSelected = selectedLayerId === layer.id;

                      return (
                        <button
                          key={layer.id}
                          type="button"
                          onClick={() => setSelectedLayerId(layer.id)}
                          className="absolute overflow-hidden rounded-lg transition-all"
                          style={{
                            left: layer.x,
                            top: layer.y,
                            width: layer.width,
                            height: layer.height,
                            border: `2px solid ${getLayerOutlineColor(layer)}`,
                            boxShadow: isSelected
                              ? `0 0 0 3px rgba(255,255,255,0.16), 0 0 0 6px ${getLayerOutlineColor(layer)}55`
                              : `0 0 0 1px ${getLayerOutlineColor(layer)}66 inset`,
                            background: assignedUrl ? "rgba(255,255,255,0.02)" : "rgba(249,115,22,0.12)",
                          }}
                        >
                          {assignedUrl ? (
                            <img
                              src={assignedUrl}
                              alt={layer.layerName}
                              className="h-full w-full"
                              style={{
                                objectFit:
                                  layer.replaceMode === "contain"
                                    ? "contain"
                                    : layer.replaceMode === "stretch"
                                      ? "fill"
                                      : "cover",
                                WebkitMaskImage: layer.maskUrl ? `url(${layer.maskUrl})` : undefined,
                                maskImage: layer.maskUrl ? `url(${layer.maskUrl})` : undefined,
                                WebkitMaskSize: layer.maskUrl ? "100% 100%" : undefined,
                                maskSize: layer.maskUrl ? "100% 100%" : undefined,
                                WebkitMaskRepeat: layer.maskUrl ? "no-repeat" : undefined,
                                maskRepeat: layer.maskUrl ? "no-repeat" : undefined,
                              }}
                            />
                          ) : (
                            <div className="flex h-full w-full items-center justify-center bg-orange-500/10 text-[13px] font-medium text-orange-100">
                              点击替换图片
                            </div>
                          )}

                          <div className="absolute left-2 top-2 rounded-full bg-black/70 px-2 py-1 text-[11px] text-white">
                            {layer.layerName}
                          </div>
                        </button>
                      );
                    })}

                    {editableTextLayers.map((layer) => {
                      const isSelected = selectedLayerId === layer.id;
                      const value = effectiveTextAssignments[layer.id] || "";
                      const sharedStyle = {
                        left: layer.x,
                        top: layer.y,
                        width: layer.width,
                        height: layer.height,
                        fontFamily: layer.fontFamily || "sans-serif",
                        fontSize: layer.fontSize,
                        lineHeight: layer.lineHeight,
                        letterSpacing: `${layer.letterSpacing}px`,
                        color: layer.textColor,
                        fontWeight: layer.fontWeight,
                        textAlign: layer.textAlign,
                        paddingLeft: layer.paddingX,
                        paddingRight: layer.paddingX,
                        paddingTop: layer.paddingY,
                        paddingBottom: layer.paddingY,
                      } as const;

                      return (
                        <div
                          key={layer.id}
                          className="absolute overflow-hidden rounded-lg"
                          style={{
                            ...sharedStyle,
                            border: `2px solid ${getLayerOutlineColor(layer)}`,
                            boxShadow: isSelected
                              ? `0 0 0 3px rgba(255,255,255,0.16), 0 0 0 6px ${getLayerOutlineColor(layer)}55`
                              : `0 0 0 1px ${getLayerOutlineColor(layer)}66 inset`,
                            background: isSelected ? "rgba(56,189,248,0.09)" : "rgba(56,189,248,0.03)",
                          }}
                          onClick={() => setSelectedLayerId(layer.id)}
                        >
                          {isSelected ? (
                            <textarea
                              value={value}
                              onChange={(event) =>
                                setTextAssignments((current) => ({
                                  ...current,
                                  [layer.id]: event.target.value,
                                }))
                              }
                              className="h-full w-full resize-none border-none bg-transparent outline-none"
                              style={sharedStyle}
                            />
                          ) : (
                            <div
                              className="pointer-events-none h-full w-full whitespace-pre-wrap break-words"
                              style={sharedStyle}
                            >
                              {value || layer.placeholder || layer.layerName}
                            </div>
                          )}

                          <div className="absolute left-2 top-2 rounded-full bg-black/70 px-2 py-1 text-[11px] text-white">
                            {layer.layerName}
                          </div>
                        </div>
                      );
                    })}
                  </div>
                </div>
              ) : (
                <div className="flex h-full w-full items-center justify-center px-6 text-center text-sm text-muted-foreground">
                  {normalizedBrandName
                    ? "请选择一个模板后开始直接在模板中编辑。"
                    : "请先返回工作流区域选择品牌，再打开 PSD 模板。"}
                </div>
              )}
            </div>
          </div>

          <div className="min-h-0 bg-[#09090b] p-5">
            <div className="mb-4 text-sm font-medium">当前选中图层</div>

            <Input
              ref={uploadInputRef}
              type="file"
              accept="image/png,image/jpeg,image/webp"
              className="hidden"
              onChange={(event) => {
                if (!selectedImageLayer) return;
                void handleSlotUpload(selectedImageLayer.id, event);
              }}
            />

            <div className="flex h-full min-h-0 flex-col gap-5">
              <div className="rounded-2xl border border-white/10 bg-white/[0.02] p-4">
                {selectedImageLayer ? (
                  <div className="space-y-4">
                    <div className="flex flex-wrap items-center gap-2">
                      <Badge variant="default">可替换图片</Badge>
                      <div className="text-sm font-medium">{selectedImageLayer.layerName}</div>
                      <Badge variant="outline">
                        {selectedImageLayer.width} x {selectedImageLayer.height}
                      </Badge>
                    </div>
                    <div className="text-xs text-muted-foreground">{selectedImageLayer.layerPath}</div>
                    <div className="overflow-hidden rounded-xl border border-white/10 bg-white/5">
                      <div className="aspect-[4/3]">
                        {effectiveImageAssignments[selectedImageLayer.id] ? (
                          <img
                            src={effectiveImageAssignments[selectedImageLayer.id]}
                            alt={selectedImageLayer.layerName}
                            className="h-full w-full object-contain"
                          />
                        ) : (
                          <div className="flex h-full items-center justify-center text-xs text-muted-foreground">
                            暂未替换图片
                          </div>
                        )}
                      </div>
                    </div>
                    <div className="flex flex-wrap gap-2">
                      {sourceImageUrl ? (
                        <Button
                          type="button"
                          variant="outline"
                          size="sm"
                          onClick={() =>
                            setImageAssignments((current) => ({
                              ...current,
                              [selectedImageLayer.id]: sourceImageUrl,
                            }))
                          }
                        >
                          使用当前图片
                        </Button>
                      ) : null}
                      <Button
                        type="button"
                        variant="outline"
                        size="sm"
                        disabled={uploadingSlotId === selectedImageLayer.id}
                        onClick={() => openImageUpload(selectedImageLayer.id)}
                      >
                        {uploadingSlotId === selectedImageLayer.id ? (
                          <Loader2 className="mr-2 h-4 w-4 animate-spin" />
                        ) : (
                          <Upload className="mr-2 h-4 w-4" />
                        )}
                        上传替换图片
                      </Button>
                      {effectiveImageAssignments[selectedImageLayer.id] ? (
                        <Button
                          type="button"
                          variant="ghost"
                          size="sm"
                          onClick={() =>
                            setImageAssignments((current) => {
                              const nextAssignments = { ...current };
                              delete nextAssignments[selectedImageLayer.id];
                              return nextAssignments;
                            })
                          }
                        >
                          清空
                        </Button>
                      ) : null}
                    </div>
                  </div>
                ) : selectedTextLayer ? (
                  <div className="space-y-4">
                    <div className="flex flex-wrap items-center gap-2">
                      <Badge variant="default">可编辑文字</Badge>
                      <div className="text-sm font-medium">{selectedTextLayer.layerName}</div>
                      <Badge variant="outline">
                        {selectedTextLayer.width} x {selectedTextLayer.height}
                      </Badge>
                    </div>
                    <div className="text-xs text-muted-foreground">{selectedTextLayer.layerPath}</div>
                    <Textarea
                      rows={5}
                      value={effectiveTextAssignments[selectedTextLayer.id] || ""}
                      placeholder={selectedTextLayer.placeholder || "请输入文字"}
                      onChange={(event) =>
                        setTextAssignments((current) => ({
                          ...current,
                          [selectedTextLayer.id]: event.target.value,
                        }))
                      }
                    />
                    <div className="flex flex-wrap gap-2 text-xs text-muted-foreground">
                      <span>字体：{selectedTextLayer.fontLabel || selectedTextLayer.fontFamily || "系统字体"}</span>
                      <span>字号：{selectedTextLayer.fontSize}px</span>
                      <span>行高：{selectedTextLayer.lineHeight}</span>
                      <span>字距：{selectedTextLayer.letterSpacing}px</span>
                    </div>
                  </div>
                ) : (
                  <div className="flex min-h-[200px] flex-col items-center justify-center text-center">
                    <MousePointerClick className="h-8 w-8 text-white/35" />
                    <div className="mt-3 text-sm font-medium">点模板中的图层开始编辑</div>
                    <div className="mt-2 text-xs leading-6 text-muted-foreground">
                      图片区域可直接替换图片，文字区域可直接改现有文字。
                    </div>
                  </div>
                )}
              </div>

              <div className="min-h-0 flex-1 rounded-2xl border border-white/10 bg-white/[0.02] p-4">
                <div className="mb-3 text-sm font-medium">导出结果</div>
                {renderedResultUrl ? (
                  <div className="flex h-full min-h-0 flex-col justify-between gap-4">
                    <div className="mx-auto w-full max-w-[280px] overflow-hidden rounded-2xl border border-white/10 bg-white/5">
                      <div
                        style={{
                          aspectRatio: selectedTemplate
                            ? `${Math.max(1, selectedTemplate.width)} / ${Math.max(1, selectedTemplate.height)}`
                            : "1 / 1",
                        }}
                      >
                        <img
                          src={renderedResultUrl}
                          alt="PSD 模板导出结果"
                          className="h-full w-full object-contain"
                        />
                      </div>
                    </div>

                    <Button onClick={handleDownload} className="w-full">
                      <Download className="mr-2 h-4 w-4" />
                      下载结果图
                    </Button>
                  </div>
                ) : (
                  <div className="flex h-full min-h-[240px] flex-col items-center justify-center rounded-2xl border border-dashed border-white/15 bg-white/[0.02] px-6 text-center">
                    <div className="flex h-16 w-16 items-center justify-center rounded-2xl bg-white/5">
                      {selectedTextLayer ? (
                        <Type className="h-8 w-8 text-muted-foreground" />
                      ) : (
                        <ImageIcon className="h-8 w-8 text-muted-foreground" />
                      )}
                    </div>
                    <div className="mt-4 text-sm font-medium">还未导出成品图</div>
                    <div className="mt-2 text-xs leading-6 text-muted-foreground">
                      在模板画布里完成替换后，点击“应用模板并导出”，这里会显示最终图片。
                    </div>
                  </div>
                )}
              </div>
            </div>
          </div>
        </div>
      </DialogContent>
    </Dialog>
  );
}